I've got a Vaillant eco TEC plus 837 that is constantly has the heating on, even though the thermostat isn't calling for it. Its not coming on full but maintaining around 42 - 54 degrees.
Hi,
I have an Alpha combi boiler installed 3 yrs ago, along side a load of new rads.
Approximately 12 after installation, the hot water ran cold and would heat up.
There were no problems with the heating.
I rang the company that installed the system, they said that as the boiler...